Registers – Platform operated – Platform actuated traffic counters
Patent
1979-05-21
1981-07-14
Thesz, Joseph M.
Registers
Platform operated
Platform actuated traffic counters
235 92V, 235 92EV, G06M 314, G07C 900
Patent
active
042788781
ABSTRACT:
A passing person counting apparatus, installed at a path (passageway) having a width allowing one person to pass through, for counting the number of persons who pass there in a various different mode or posture, automatically and exactly. It is provided with a trunk portion sensing section with at least a pair of photo-switches, installed at a height of the trunk portion of a human body with an inter-distance slightly narrower than the thickness of the trunk portion, and a leg portion sensing section with at least a pair of photo-switches, installed beneath the former and very closely to each other. The apparatus is constructed such that it counts up one person when at least the under-mentioned three conditions have been fulfilled: (1) all of the photo-switches of the trunk portion sensing section are simultaneously interrupted at least once; (2) the photo-switches of the leg portion sensing section are interrupted while at least one of the photo-switches of the trunk portion sensing section is being interrupted; and (3) the leg which has interrupted the photo-switches of the leg portion sensing section advances in the passing direction without making a turning back.
REFERENCES:
patent: 3808410 (1974-04-01), Schlesinger
patent: 4000400 (1976-12-01), Elder
patent: 4009389 (1977-02-01), Lindholm
patent: 4070560 (1978-01-01), Blanyer
patent: 4081661 (1978-03-01), Durbin
Tanaka Business Machines Co. Ltd.
Thesz Joseph M.
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